Author Archives: Hoan Huynh


About Hoan Huynh

Hoan Huynh is the founder and head of 4rapiddev.com. Reach him at hoan@4rapiddev.com


Check Free Disk Space On Linux Posted by in Linux | 1 Comment

To check free disk space on Linux system, we can use df command as below. Note that, this command is executed on Amazon EC2 environment. Continue reading

Count Total Rows For All Tables In MS SQL Server Posted by in SQL Server | 1 Comment

This SQL script below will count and display list of table name along with total rows for all tables in a specified MS SQL Server Database. Continue reading

TortoiseSVN Shows Icons On Network Drives Posted by in Tips And Tricks | Leave a comment

By default, TortoiseSVN’s icons only visible on local drives, in order to show TortoiseSVN’s icons on Network Drives, follow simple steps below. Continue reading

Create VBScript VBS To Run An EXE File Or Windows Applicaion Posted by in Tips And Tricks | Leave a comment

Below is a VBScipt (.vbs) that calls an executable file (.exe) or a Windows application. In this example, I create a .vbs file that will call SVN.exe (in TortoiseSVN) command to update source code from my SVN server Continue reading

Create A Strong Password With Rules And Recommendations Posted by in Tips And Tricks | Leave a comment

In order to create a strong password that is hard to guess or be cracked/hacked, there are some rules and recommendations you should always follow. Continue reading

YouTube Thumbnail URLs And Examples Posted by in Internet | Leave a comment

For each YouTube video, there are multiple thumbnail image URL formats that we can display/get manually. Or we can program to download thumbnail image from your uploaded video and show them in your own gallery. Continue reading

How To Group Related Options In A Drop Down List Posted by in Tips And Tricks | Leave a comment

Grouping related options in a drop down list is a easiest way to display a group of parent categories and child categories in a drop down list. And all parent categories (group headers) will be Bold. Continue reading

Free, Simple And Easiest Copy Software Posted by in Internet | Leave a comment

I’ve just used a free software called Ycopy to copy whole a hard drive over 100 GB to a back up drive over the network just in one night. Then it reported to me a list of files in specified folder that couldn’t be copied. Continue reading

PHP MD5 AND SHA1 Examples Posted by in PHP | Leave a comment

Below are simple examples how to use MD5 and SHA1 algorithm to encrypt a particular string. And provide a list of common encrypted string by using MD5 and SHA1 function. Continue reading

Get WordPress Most Popular Posts By Total Comments Posted by in PHP | Leave a comment

This article shows How to retrieve and display the most popular posts by total comments on your WordPress template. A PHP function below will use the get_results function to run a SQL query to the WordPress posts table to get the top posts with highest comments. Continue reading